Nut-lock



(No Model.) I

P. M. DIPANY.

NUT LOCK.

No. 449,211. Patented Mar. 31,1891.

A m y if 'I 4 UN i'rnn STATES a'rnnrr FFiE.

FRANCIS M. DIFANY, OF MARION, OHIO.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 449,211, dated March 31, 1891.

Application filed November 28, 1890. Serial No. 372,875. (No model.

To all whom it may concern;

Be it known that I, FRANCIS M. DIFANY, a citizen of the United States, residing; at Marion, in the countyof Marion and State of Ohio, have invented a new and useful Nut- Lock, of which the followingis a specification.

This invention has relation to improvements in nut-locks, the objects in view being to provide a cheap and simple lock adapted to be used in connection with the ordinary nutbolt and washer, and requiring for its adaptation simply a slight inexpensive addition to the washer, the bolt-and nut remainingintaet.

Various other objects and advantages of the invention will appear in the following description, and the novel features of the invention will be particularly pointed out in the claims.

Referring to the drawings, Figure l is a front elevation of a portion of a railwayjoint the nuts of which are locked in accordance with my invention. Fig. 2 is a horital longitudinal section of the joint. Fig. 3 is a detail in rear elevation of the washer. Fig. 4 is a perspective of alookingkey. Fig. 5 is a vertical section on the line acre of Fig. 1.

Like numerals of reference indicate like parts in all the figures of the drawings.

1 designates the usual rail-sections, the adjacent ends of which are overlapped by the ordinary fish bar or plate 2, which together with the rails are provided with openings for the reception of the bolts 3.

4E designates a washer having a central opening 5 to loosely fit over the bolt, and 6 designates a nut threaded on the end of the bolt and screwed home against the washer. The Washer is provided at one side of and substantially flush with one of the faces of the nut with an oblong opening or perforation 8, and upon its rear face at. each side of said opening with recesses 9, disposed at diagonally-opposite sides of the opening, the bottoms of the recesses being inclined in opposite directions and being deepened toward the opposite ends of the opening.

10 designates a key which comprises the substantially rectangular cube-shaped head 11, one corner of which is slightly rounded below the same with a reduced cylindrical shank 12, depending from the head opposite the rounded corner and at the inner end of the shank with a transverse oblong or T- shaped head 12, extending at each side of the shank and having its ends upon its outer face beveled in opposite directions, as at 13, forming opposite drawing-shoulders.

It will be seen that the only change necessary to adapt the old style of washer for the key is in the formation of the key-receiving opening, as described.

In operation the bolt, washer, and nut are mounted in position as usual, when in order to lock the nut upon the bolt it is simply necessary to introduce the T end of the key in the oblong opening in the washerand give the same a quarter-turn, which serves to bind its inclined or drawing-shoulders against the recesses in the rear face of the washer, and the key is thus locked against removal. The natural tendency of the nut to retrograde or work off the bolt serves to bind one of its faces against an adjacent face of the key, so that the greater the tendency of the nut to work loose the more securely is the key bound atits inner end against the bottom of the recesses, so that a removal of the nut without first a withdrawal of the key is impossible, and while yet so safe and reliable its removal when necessary may bereadily accomplished by applying a wrench to the nut, giving it a slight movement inwardly upon thebolt so as to release its pressure at the side of the key, give the key a slight rotation to the right, and withdraw the same.

Havingdescribed in y invention,what I claim 1s- 1. The combination, with the bolt, nut, and washer, the latter provided with an opening at one side of the nut, said washer being provided upon its inner face at opposite sides of the opening with shallow recesses, of a key provided at one end with a head adapted for contact with one of the faces of the nut and at its other or inner end provided with a head for taking in the recesses, the upper sides of the head having oppositely-inclined faces or shoulders, substantially as specified.

2. The combination, with the bolt, the nut, and the washer, the latter provided with an oblong opening located about in a plane with the face of the nut and provided at its inner end at opposite sides with recesses having oppositely-inclined bottoms, of a key comprised of a rectangular head, one corner of I In testimony that I claim the foregoing as which is rounded, a cylindrical reduced shank my own I have hereto afiixed my signature in [0 extending remw Fu'dly from the head and terpresence of two witnesses. minatin in a head at the other end the t t p r 3 inner fa ees of which are provided Wit-F1 in- ERAACIS DIFANX' clined drawing-shoulders adapted to engage Witnesses: the inclined bottoms of the recesses, sub- JOHN JONES, stantially as specified. l M. V. PAYNE. 

